89 lines
2.6 KiB
PHP
89 lines
2.6 KiB
PHP
<?php
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/**
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* @package FOF
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* @copyright Copyright (c)2010-2021 Nicholas K. Dionysopoulos / Akeeba Ltd
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* @license GNU General Public License version 2, or later
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*/
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namespace FOF30\Download;
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defined('_JEXEC') || die;
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use FOF30\Download\Exception\DownloadError;
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/**
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* Interface DownloadInterface
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*
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* @codeCoverageIgnore
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*/
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interface DownloadInterface
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{
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/**
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* Does this download adapter support downloading files in chunks?
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*
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* @return boolean True if chunk download is supported
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*/
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public function supportsChunkDownload();
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/**
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* Does this download adapter support reading the size of a remote file?
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*
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* @return boolean True if remote file size determination is supported
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*/
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public function supportsFileSize();
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/**
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* Is this download class supported in the current server environment?
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*
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* @return boolean True if this server environment supports this download class
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*/
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public function isSupported();
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/**
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* Get the priority of this adapter. If multiple download adapters are
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* supported on a site, the one with the highest priority will be
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* used.
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*
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* @return boolean
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*/
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public function getPriority();
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/**
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* Returns the name of this download adapter in use
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*
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* @return string
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*/
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public function getName();
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/**
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* Download a part (or the whole) of a remote URL and return the downloaded
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* data. You are supposed to check the size of the returned data. If it's
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* smaller than what you expected you've reached end of file. If it's empty
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* you have tried reading past EOF. If it's larger than what you expected
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* the server doesn't support chunk downloads.
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*
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* If this class' supportsChunkDownload returns false you should assume
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* that the $from and $to parameters will be ignored.
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*
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* @param string $url The remote file's URL
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* @param integer $from Byte range to start downloading from. Use null for start of file.
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* @param integer $to Byte range to stop downloading. Use null to download the entire file ($from is
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* ignored)
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* @param array $params Additional params that will be added before performing the download
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*
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* @return string The raw file data retrieved from the remote URL.
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*
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* @throws DownloadError A generic exception is thrown on error
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*/
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public function downloadAndReturn($url, $from = null, $to = null, array $params = []);
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/**
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* Get the size of a remote file in bytes
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*
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* @param string $url The remote file's URL
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*
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* @return integer The file size, or -1 if the remote server doesn't support this feature
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*/
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public function getFileSize($url);
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}
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